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Maximum power point tracking using Hill Climbing and ANFIS techniques for PV applications: A review and a novel hybrid approach

Research Authors
Mohamed Lasheena,b , Mazen Abdel-Salamc,
Research Department
Research Year
2018
Research Journal
Energy Conversion and Management
Research Publisher
NULL
Research Vol
Vol. 171
Research Rank
1
Research_Pages
pp. 1002–1019
Research Website
NULL
Research Abstract

The development of Maximum Power Point Tracking (MPPT) techniques is continuing in order to increase the
generated energy from photovoltaic (PV) generators. A variety of MPPT techniques have been proposed and
classified based on three main categories: offline, online and hybrid techniques. This paper presents a review of
the most popular techniques for offline and online tracking of the Maximum Power Point (MPP), which are the
Adaptive Neuro-Fuzzy Inference System (ANFIS) and Hill Climbing (HC) techniques, respectively. This is in
addition to a review for all hybrid techniques reported in the literature demonstrating their main merits and
shortcomings. Moreover, the present paper combines the ANFIS and HC as a hybrid technique for the first time.
The proposed technique involves the features of the ANFIS and HC techniques and mitigates their shortcomings
in order to increase the generated PV electrical energy. The proposed technique is a combination of two stages to
assess the duty ratio (control signal) being applied to a boost converter for MPP tracking. The first stage includes
a set point calculation loop to estimate the duty ratio. The second stage involves a fine tuning loop to determine
the exact duty ratio corresponding to the MPP. This achieves maximum power transfer to the load even under
nonuniform climatic conditions using a relatively simple control system. The proposed technique has been simulated
in MATLAB/SIMULINK environment and compared with some other MPPT techniques (the Constant
Voltage (CV), ANFIS, HC, Incremental Conductance (IncCond) techniques) for steady state and rapidly changing
climatic conditions (Ropp and sine radiation tests) as well as load variations. The results reveal that the proposed
hybrid MPPT technique outperforms other MPPT techniques in term of performances indicators, which include
the tracking speed, tracking accuracy and energy gain factor.